16- Duration of visa:
– Duration of visa validity: 90 days, 180 days, one (01) year and two (2) years.
– Duration of stay: the maximum duration of stay authorized at each entry into Algeria is 90 days, which may, exceptionally, be extended not to exceed 90 days. The actual cumulative stay may not exceed 180 days per year.
– Duration of stay of the transit visa is 07 days.
17- Number of entries: single entry or multiple entries depending on the type of visa and depending on the case.
https://www.mfa.gov.dz/fr/services-for-foreigners/entry-visa-to-algeria
